User guide
19
Configuration
Initial configuration
ALIF units are designed to be as flexible as possible, and this principle extends
also to their configuration.
• WhereanALIFTXandanALIFRXaredirectlylinkedtoeachother,no
configuration action is required, provided that they have their factory default
settings in place. If the standard settings have been changed in a previous
installation, you merely need to perform a factory reset on each unit:
• WhereALIFunitsareconnectedvianetworklinks,youwillneedtospecify
their network address details. This can be done using a computer system
temporarily linked to each ALIF unit via a network connection together with
the Infinity browser-based configuration utility. This configuration utility
also allows numerous other settings to be altered.
Manual factory reset
A factory reset returns an ALIF TX or RX unit to its default configuration. You
can perform factory resets using either of the two configuration utilities or by
using this direct manual method.
To perform a manual factory reset
1 RemovepowerfromtheALIFunit.
2 Useanarrowimplement(e.g.astraightened-outpaperclip)pressand
hold the recessed reset button on the front panel. Power on the unit and
then release the reset switch.
After roughly eight seconds, when the factory reset has completed, five
of the front panel indicators will flash for a period of three seconds to
indicate a successful reset operation.
3 Remove and then re-apply power to start the unit in its default
configuration.
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Use a straightened-out paper clip to press the reset button
while powering on the unit
Configuring network switches to ensure efficient operation
WithIPMulticastthereisariskthatnetworksegmentscangetsaturated
with data that are not destined for any device on that segment. Unless some
intelligence is applied, it’s possible for a naive IP switch to pass multicast data
onto every port on the switch. This can lead to performance degradation and
wasted network bandwidth. Fortunately, however, modern switches employ a
technique known as IGMPSnooping(InternetGroupManagementProtocol)
which enables them to be selective about where they route multicast IP traffic
- routing it only through switch ports which contain devices that are specifically
interested in such traffic.
IGMPSnoopingcansignicantlyreducetheamountoftrafcgeneratedby
ALIF TX units that are configured for multicast operation. It is beyond the scope
ofthisdocumenttodetailhowtoenableandcongureIGMPsnoopingfor
particularGigabitIPSwitches.However,westronglyrecommendthatwhen
deployinganALIFNetworkyoushouldselectIPswitchesthatsupportIGMP
snooping, and this snooping should be enabled and appropriately configured.
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